TSM备份报错，如何处理？

我怀疑我的磁带空间没释放导致的。

报错如下：

channel ch1 disabled, job failed on it will be run on another channel 
RMAN-03009: failure of backup command on ch4 channel at 01/19/2016 03:36:46 
ORA-19502: write error on file "VIP_VIP_db_egqrnt1u_1_1_20160119_2512_1", block number 1872129 (block size=8192) 
ORA-27030: skgfwrt: sbtwrite2 returned error 
ORA-19511: Error received from media manager layer, error text: 
ANS1312E (RC12) Server media mount not possible 
channel ch4 disabled, job failed on it will be run on another channel 
RMAN-03009: failure of backup command on ch5 channel at 01/19/2016 03:38:41 
ORA-19502: write error on file "VIP_VIP_db_ehqrnt1u_1_1_20160119_2513_1", block number 917633 (block size=8192) 
ORA-27030: skgfwrt: sbtwrite2 returned error 
ORA-19511: Error received from media manager layer, error text: 
ANS1312E (RC12) Server media mount not possible 
channel ch5 disabled, job failed on it will be run on another channel 
RMAN-03009: failure of backup command on ch3 channel at 01/19/2016 03:46:17 
ORA-19502: write error on file "VIP_VIP_db_efqrnt1u_1_1_20160119_2511_1", block number 1334401 (block size=8192) 
ORA-27030: skgfwrt: sbtwrite2 returned error 
ORA-19511: Error received from media manager layer, error text: 
ANS1329S (RC29) Server out of data storage space

如何让他释放呢？

oracle客户端检查了脚本：有释放脚本。

求各位大哥帮忙看看？